![Boca-Semiconductor](/logo/Boca-Semiconductor.png)
Boca Semiconductor
GENERAL PURPOSE TRANSISTORS
![Semelab](/logo/Semelab.png)
Semelab - > TT Electronics plc
Bipolar NPN Device in a Hermetically sealed TO39 Metal Package.
![Central-Semiconductor](/logo/Central-Semiconductor.png)
Central Semiconductor
NPN SILICON TRANSISTOR TO-39 CASE
![GESS](/logo/GESS.png)
GE Solid State
GENERAL PURPOSE MEDIUM POWER SILICON NPN PLANAR TRASISTORS